fix: restore v3.5.0 release date to 2026-02-18 (#99)

Java SDK v3.5.0 was published to Maven Central on Feb 18.
The date was incorrectly changed to Feb 19 in PR #98.

Author: saurabhjain1592

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to the AxonFlow Java SDK will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [3.5.0] - 2026-02-19
+## [3.5.0] - 2026-02-18
 
 ### Added